<template>
	<view>
		<my-search @click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<scroll-view scroll-y :style="{height: wh + 'px'}" class="left-scroll-view" >
				<block v-for="(item,i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>
					
				</block>
				
				        
			</scroll-view>
			<scroll-view scroll-y :style="{height: wh + 'px'}" class="right-scroll-view" :scroll-top="scrollTop">
				 <view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
				    <view class="cate-lv2-title">/ {{item2.cat_name}} /</view>
					 <view class="cate-lv3-list">
					      <!-- 三级分类 Item 项 -->
					      <view class="cate-lv3-item" v-for="(item3, i3) in item2.children" :key="i3" @click="gotoGoodsList(item3)">
					        <!-- 图片 -->
							<image :src="item3.cat_icon" mode="widthFix"></image>
					        <!-- <image src="/static/3.jpg" mode="scaleToFill" @error="onImageError('item2.children',index)"></image> -->
					        <!-- 文本 -->
					        <text>{{item3.cat_name}}</text> 
					      </view>
					    
						</view>
				   
				   </view>
				  
			</scroll-view>
			
		</view>
		
	</view>
</template>

<script>
	import badgeMix from '../../mixins/tabbar-badge.js'
	export default {
		mixins: [badgeMix],
		data() {
			return {
				wh: 0,
				active: 0,
				cateList: [],
				cateLevel2: [],
				placeholder:'/static/3.jpg',
				scrollTop: 0
				
			}
		},
		onLoad() {
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
			
			// 调用获取分类列表数据的方法
			this.getCateList()
			
			
		},
		methods: {
			async getCateList(){
				
				const { data: res} = await uni.$http.get('/api/public/v1/categories')
				console.log(res)
				if(res.meta.status !== 200) return uni.$showMsg()
				this.cateList = res.message
				// 二级分类赋值
				this.cateLevel2 = res.message[0].children
			    
			},
			activeChanged(i){
				this.active = i
				this.cateLevel2 = this.cateList[i].children
				
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			onImageError(data,index){
				this[data][index].icon=this.placeholder
				
			},
			gotoGoodsList(item3){
				uni.navigateTo({
					url:'/subpkg/goods_list/goods_list?cid=' +item3.cat_id
				})
			},
			gotoSearch(){
				uni.navigateTo({
					url:'/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
	  display: flex;
	
	  .left-scroll-view {
	    width: 120px;
	
	    .left-scroll-view-item {
	      line-height: 60px;
	      background-color: #f7f7f7;
	      text-align: center;
	      font-size: 12px;
	
	      // 激活项的样式
	      &.active {
	        background-color: #ffffff;
	        position: relative;
	
	        // 渲染激活项左侧的红色指示边线
	        &::before {
	          content: ' ';
	          display: block;
	          width: 3px;
	          height: 30px;
	          background-color: #c00000;
	          position: absolute;
	          left: 0;
	          top: 50%;
	          transform: translateY(-50%);
	        }
	      }
	    }
	  }
	}
   .cate-lv2-title {
     font-size: 12px;
     font-weight: bold;
     text-align: center;
     padding: 15px 0;
   }
   .cate-lv3-list {
     display: flex;
     flex-wrap: wrap;
   
     .cate-lv3-item {
       width: 33.33%;
       margin-bottom: 10px;
       display: flex;
       flex-direction: column;
       align-items: center;
   
       image {
         width: 60px;
         height: 60px;
       }
   
       text {
         font-size: 12px;
       }
     }
   }
</style>
